<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Ban the link working.</title>
</head>
<body>
    <a href="www.google.com" id="alink">Google</a>

    <script>
        document.getElementById("alink").onclick=function(){
            alert("I was clicked!");
            return false;
        }
    </script>
</body>
</html>